Effects of Fluorination on the 90 K Superconductor Ba2RCu3O(7-delta) (R=Y,Eu; O< Delta <1)

Abstract

Sintered pellets of Ba2RCu3O7-delta (R= Y,Eu; 0 < or = delta < or = 1) were allowed to react with fluorine gas at temperatures between 200 and 300 C. Fluorination of Ba2YCu3O6.92 affords a nominal composition of BaYCu3O6.4F1.3 and Tc(onset) = 92K. Fluorination of Ba2YCu3O6.15 gives a nominal composition of Ba2YCu3O4.7F3.0, which is not superconducting to 4.2K. Fluorinated pellets appear to be single-phase as determined by X-ray powder diffraction. However, Raman, NQR, ESR, X-ray diffraction, and TEM data suggest that fluorine is not incorporated into the superconducting phase, but rather is incorporated into a secondary amorphous phase. Barium, Copper oxides. (mjm)

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Document Details

Document Type
Technical Report
Publication Date
Jul 15, 1988
Accession Number
ADA197176

Entities

People

  • A. M. Thayer
  • D. C. Douglas
  • D. M. Krol
  • D. W. Murphy
  • G. F. Brennert
  • M. Greenblatt
  • S. M. Fine
  • S. M. Zahurak
  • S. Nakahara
  • W. W. Warren Jr.

Organizations

  • Rutgers University–New Brunswick

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Amorphous Materials
  • Chemical Analysis
  • Chemical Compounds
  • Chemistry
  • Diffraction
  • Electron Diffraction
  • Elements
  • Fluorination
  • Fluorine
  • Materials
  • Measurement
  • New Jersey
  • Raman Spectra
  • Scattering
  • Spectra
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Physics

Readers

  • Superconducting Magnet Technology
  • Thin Film Deposition Science.